Excellent product, excellent priceBy shaungeeon 5/11/2011

shaungee would recommend this product to a friend

This product exceeded my expectations from what I had in mind after seeing the price. This is by far some of the most effective media I have found to date. Within 72 hours, my PO4 levels zeroed out and have not risen in two weeks. Amazing stuff!

InexpensiveBy Timon 5/10/2011

Tim would recommend this product to a friend

Purchased this a couple of years ago when it was sold in bag form and it's a solid performer. Performs just like the big brands at a fraction of the price.

Great product! I will be buying more of this!By Chrison 5/9/2011

Chris would recommend this product to a friend

I bought this due to it's phenominally low price, and was a little hesitant. It turned out to be an excellent product, and easily performs as well as the higher priced brand name types. I plan to buy more, as soon as I need it. It doesn't require a ton of rinsing, and if you use half the recommended dosage, but change it out twice as often, I've found it works better at reducing algae, and keeps the system more stable. Thanks, BRS!

No more phosphateBy Jerryon 4/29/2011

Jerry would recommend this product to a friend

An absolute must for a reef tank. Does an excellent job removing phoshate from the aquarium.

Great product!By DJon 4/15/2011

DJ would recommend this product to a friend

Don't have a big problem with phosphates but I still run this product 24/7. Easy to use.

Good Stuff!By Steveon 4/11/2011

Steve would recommend this product to a friend

Works great.......wouldn't run a reef tank without it.

Good Stuff!By Gabrielon 4/7/2011

Gabriel would recommend this product to a friend

I could see the growth take off on my sps corals immediately after using this. Highly recommend.

Cuts down that Phosphate By Jetthrilon 3/30/2011

Jetthril would recommend this product to a friend

Unlike most other folks would use this product in a reactor, I used this product in a media bag. Be sure to rinse out the dust before use. Due to the fact that the GFO bunches up after getting wet, I would recommend using less than what the calculator on this website recommends and change the media more frequently (not every 8 weeks), that way you water can more easily flow through the media, and the GFO can more easily take out the phosphate in the water.

greatBy jesseon 3/28/2011

jesse would recommend this product to a friend

works and performs great in my brs reactor..

Works great in a Freshwater Planted TankBy Duaneon 3/20/2011

Duane would recommend this product to a friend

I first of all borrowed some GFO from a fellow reefer to use in my Planted FW Discus 90gal. I was having a terrible time with algae. I followed the directions on the BRS "Information" page and set up a reactor with the GFO. Within a few days, my Phosphate level went for a 2ppm to a .5ppm. The GFO helps maintain the Phosphates at a acceptable level. It does not zero the phosphates out because my substrate leaches phosphates into the water and I want low level phosphates to aid in plant growth. So I have found this stuff works perfectly for me. So I purchased my own BRS GFO, which is a much better buy than the name brand. Thanks BRS!

Best GFO on the marketBy Rickon 3/17/2011

Rick would recommend this product to a friend

Don't be fooled by other "branded" GFO, this one works, and works well. I've used it for years and test 0.0 PO4!

Effective GFOBy Michaelon 3/17/2011

Michael would recommend this product to a friend

I have a 100 gallon heavily stocked SPS tank. The BRS Granular GFO is by far the best cost saving choice and maintains phosphate at nearly zero as well as any of the name brand GFO. I've tried many of the different types on the market and have observed no difference in coral growth and calcification. It is an effective GFO at a fraction of the cost. Keep in mind that running GFO is reported to knock down magnesium levels. You may need to order the magnesium supplements from BRS and a test kit to maintain your levels. Another option is to run GFO sporadically to knock down the phosphate levels and reduce amount you feed. For best results start running GFO with a new tank.